Insert the adapter 1687/10 into the air intake sleeve 1 and secure it with a clamp.
Prepare the VAG 1687 boost tester for testing (pic. 2.223).
Unscrew pressure regulator 2 completely and close valves 3 and 4 (pic. 2.224).
NOTE: To rotate the pressure regulator 2, its handle must be pulled up.
Connect a tester for turbocharging systems VA G 1687, as shown in Figure 2.223.
Connect to compressed air source 1 (line or compressor) boost system tester VAG 1687.
NOTE: If there is water in the collection cup, drain it through drain plug 6.
Open valve 3.
Set the pressure to 0.5 bar using regulator 2.
WARNING: The maximum pressure must not exceed 0.5 bar. Higher pressure can cause engine damage.
Open valve 4 and wait until the circuit is filled with compressed air. If necessary, set the pressure regulator back to 0.5 bar.
Search for leaks by listening and running your hand near suspicious places. You can also use a leak detection aerosol or ultrasonic noise detector VA G 1842.
NOTE: Minor leaks are acceptable in the turbocharger intake area as the intake hoses are not designed for overpressure.
NOTE: A small amount of air enters through the valves into the engine. For this reason, it is not possible to check the residual pressure.
Operation of the device for capturing ultrasonic noise VAG 1842.
When repairing leaks found, follow the installation instructions for the pressurization system.
Before removing adapters, depressurize the circuit by removing the coupling from adapter 1687/10.
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